With a long ride looming I bought a B17 off ebay for £30, still plenty of thread left on the tensioner. Treated it to lots of Dubbin, and wore it to my shape over about 2 months prior to an epic 13 hours in the saddle ride (mainly road ). I now find myself using it whenever there are long rides, both on and off road. I love it. After three hours on a Charge Spoon I'm wanting the Brooks.
My wife recently borrowed a bike with a newish B17 and after four or five training rides managed a 75 miler with no complaints about the saddle, which is remarkable. I'm in the process of putting together a bike for her and the only stipulation is that it has a Brooks ladies version of the B17.